This bill proposes a sales tax exemption on materials, supplies, and equipment used in specific construction projects in Watertown, Minnesota. The eligible projects detailed in the bill are the construction of a new water tower and a wastewater treatment facility, with specified dates for when purchases need to be made to qualify for the exemption. The purchased items will initially be taxed, but the tax will be refunded. The money needed for the tax refunds will come from Minnesota's general fund.